升级glibc到2.14

转载：https://my.oschina.NET/zhangxu0512/blog/262275

今天运行一个例程，出现了/lib64/libc.so.6: version `GLIBC_2.14' not found问题，把解决过程简单记录一下。

系统环境： centos6.2 

现象：

[root@localhost nvEncodeApp]# ./nvEncoder
./nvEncoder: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by ./nvEncoder)

好吧，人家需要的是'GLIBC_2.14'，先查看一下当前系统glibc的情况：

[root@localhost build]# strings /lib64/libc.so.6 |grep GLIBC
GLIBC_2.2.5
GLIBC_2.2.6
GLIBC_2.3
GLIBC_2.3.2
GLIBC_2.3.3
GLIBC_2.3.4
GLIBC_2.4
GLIBC_2.5
GLIBC_2.6
GLIBC_2.7
GLIBC_2.8
GLIBC_2.9
GLIBC_2.10
GLIBC_2.11
GLIBC_2.12
GLIBC_PRIVATE

好吧，确实没有，那简单粗暴，安装一下。

1. glibc下载

从http://www.gnu.org/software/libc/ 下载源代码。我下载的版本是2.14，链接地址是http://ftp.gnu.org/gnu/glibc/glibc-2.14.tar.gz。

2. 安装

因为glibc库使用广泛，为了避免污染当前系统环境，最好自定义安装目录，使用时定义一下环境变量就行了。具体步骤如下：

[root@localhost ~]# tar xvf glibc-2.14.tar.gz
[root@localhost ~]# cd glibc-2.14
[root@localhost glibc-2.14]# mkdir build
[root@localhost glibc-2.14]# cd ./build
[root@localhost build]# ../configure --prefix=/usr/local/glibc-2.14
[root@localhost build]# make -j4
[root@localhost build]# make install

3. 测试

[root@localhost nvEncodeApp]# export LD_LIBRARY_PATH=/usr/local/glibc-2.14/lib:$LD_LIBRARY_PATH
[root@localhost nvEncodeApp]# ./nvEncoder
Error!  Command line paramters -outFile is required in order to run this application
[ NVENC 3.0 Command Line Encoder]
Usage: nvEncoder -configFile=config.txt -numFramesToEncode=numFramesToEncode -outFile=output.264 <optional params>

> Encoder Test Application Parameters
[maxNumberEncoders=n] n=number of encoders to use when multiple GPUs are detected
> Optional Parameters to be Set from ConfigFile Or from Command Line
[frameNum]           Start Frame (within input file)
[bitrate]            Video Bitrate of output file (eg: n=6000000 for 6 mbps)
[maxbitrate]         Video Bitrate of output file (eg: n=6000000 for 6 mbps)
[rcMode]             Rate Control Mode (0=Constant QP, 1=VBR, 2=CBR, 4=VBR_MinQP, 8=Two-Pass CBR
[enableInitialRCQP]  Enable Initial Frame RC QP mode setting
[initialQPI]         Initial Frame QP for Intra Frame
[initialQPP]         Initial Frame QP for Inter P-Frame
[initialQPB]         Initial Frame QP for Inter B-Frame
[frameRateNum]       Frame Rate numerator   (default = 30000)  (numerator/denominator = 29.97fps)
[frameRateDen]       Frame Rate denominator (default =  1001)
[gopLength]          Specify GOP length (N=distance between I-Frames)
[profile]            H.264 Codec Profile (n=profile #)
66  = (Baseline)
77  = (Main Profile)
100 = (High Profile)
[numSlices]          Specify Number of Slices to be encoded per Frame
[preset]             Specify the encoding preset
-1 = No preset
0 = NV_ENC_PRESET_DEFAULT
1 = NV_ENC_PRESET_LOW_LATENCY_DEFAULT
2 = NV_ENC_PRESET_HP
3 = NV_ENC_PRESET_HQ
4 = NV_ENC_PRESET_BD
5 = NV_ENC_PRESET_LOW_LATENCY_HQ
6 = NV_ENC_PRESET_LOW_LATENCY_HP
[numBFrames]         Number fo B frames between P successive frames
[syncMode]           Run NvEnc in sync Mode if set
[interfaceType]      Run NvEnc at specified Interface
0  = (DX9)
1  = (DX11)
2  = (cuda)
3  = (DX10)
[vbvBufferSize]      HRD buffer size. For low latancy it should be less or equal to single frame size
[vbvInitialDelay]    Initial HRD bufffer Fullness
[fieldMode]          Field Encoding Mode (0=Frame, 1=Field)
[level])             Codec Level value
[inFile])            InputClip
[enablePtd])         if set picture type decision will be taken by EncodeAPI
[reconfigFile]       Reconfiguration will occur after the frameNum mentioned in reconfig file with specifie